功能要求：
要求用户输入自己拥有总资产，例如：2000
显示商品列表，让用户根据序号选择商品，加入购物车
购买，如果商品总额大于总资产，提示账户余额不足，否则，购买成功。
goods = [
{"name": "电脑", "price": 1999},
{"name": "鼠标", "price": 10},
{"name": "游艇", "price": 20},
{"name": "美女", "price": 998},
]'''
goods = [
{"name": "电脑", "price": 1999},
{"name": "鼠标", "price": 10},
{"name": "游艇", "price": 20},
{"name": "美女", "price": 998},
]
while True:
name =input("输入用户名:")
mima =input("请输入用户密码:")
if name =="qi"and mima =="123":
print("登陆成功")
break
else:
print("用户名或密码错误")
money = int(input("总资产"))
lst=[]
while 1:
print('----------商品列表------------')
for i,m in enumerate (goods):
print(i,m)
select =input("请选择您要购买的商品:")
if select.isdigit():
if 0<=int(select)<len(goods):
s=goods[int(select)]
a =s.get("price")
print(a)
if a >=money:
print("账户余额不足")
else:
w = s.get("price")
moneys =money-w
print("余额还剩",moneys)
lst.append(s)
print(lst )
print("购买成功")
else:
print('选择有误,请重新选择')
elif select == 'q':
print('--------------选中商品列表-------------')
for i,v in enumerate(lst):
print(i,v)
break
